Channeling-saw



(No Model.)

J LBSHBR.

CHANNELING SAW.

Patented Sept. 25, 1883.

LIENS. Plum-LnnwnpnefV wauwmlon. ac.

UNITED STATES PATENT` OFFICE.

JOSEPH LESHER, OF TOLEDO,IOHIO.

CHANNELING`SAW.

SPECIFICATION forming part of Letters Patent No. 285,633, dated September 25, 1883.

Application filed May 17, 1883. (No model.)

Be it known that I, J osEPrr LEsHEE, a citizen of the United States, residing at Toledo,

in the county of Lucas and State of Ohio, have invented new 4and useful Improvements in Channeling-Saws, of which the following is a specification.

This linvention relates to improvements in circular saws more especially designed to chan` nel rock for blasting and other purposes; and the invention has for its obj ect to provide novel means for securing the diamond or other cutters in position on the periphery of the web or body ofthe saw. This object I accomplish in the manner and by the means hereinafter described and claimed, and as illustrated in the accompanying drawings, in which-4 Figure lis a side elevation ofthe saw; Fig. 2, a cross vsection taken through the body of the saw and through one of the saddle-blocks, clamps, wedge, and screw. Fig. 3 is an enlarged end view of a saddle-block, showing the parts holding the diamonds in position; and Fig. 4 isa back and front view of a saddleblock complete. f

, Similar letters refer to similar parts throughout the several views.

Arepresents the web or body of the saw, having an enlargement in the form of afiange, a a, on each side of its extreme outer edge, thus forming a broad surface on the periphery. To

this periphery are secured, by means of bolts, screws, or rivets, saddle-blocks B B, there being any number desired of them, according to the diameter of the saw. The outer portion of this saddle-block B is constructed with a cylindrical opening crosswise of the block, in which opening are closely itted two clampblocks, CV O, made of copper or other suitable soft metal,between the outer edges of which are bedded a row of black diamonds, D,`or other suitable material for cutting rock. The inner edges of the clamp-blocks C G recede from each other, thus forming a triangularopening, in which atriangular wedge, W, is

inserted, and set-screws S S, operated in a cavity on the concave side of the saddle-block B, lforces the wedge W against the clampblocks O C, which-forces them outward, and,

in turnfupward and around in the direction of `the curve of their periphery, thus securely clamping the material placed between their outer edges for cutting. A series of holes are tapped for the set-screws, so that a forward or backward incline may be given to the wedge "W, the clamp-blocks C O, and the cutters D,

thus adjusting the cutters to a new edge without resetting them.

Having thus described my invention, what I claim as new, aud desire to secure by Letters Patent, isf- 1. The combination of the web or body havingthe iianges at its periphery, the saddleblock attached to the iianges and having a transverse opening, the clamp-blocks arranged in the said opening and holding the cutter between their outer ends, the wedge arranged between the inner ends of the clamp-blocks, and the set-screw passing through the flange on the web or/body and acting on the wedge, substantially as and for the purpose described.

2. The combination of the web or body having the flanges at its periphery, the saddleblock attached to the flanges and having a cylindrical transverse opening, the clamp- `of the saddle-block, the triangular wedge arranged between the clamp-blocks, and the set- `screw passing through the flange on the web or body and acting on the wedge, substantially as described.

In testimony whereof I`have hereunto set my hand in the presence of two subscribing witnesses.

JOSEPH LESHER.

Witnesses:

J osErrr N. GLoUsE, WILLIAMH. TUCKER. 

